1. Large springs in the Valley and Ridge Province in Tennessee Author/Creator: Hollyday, E. F., author Publication/Creation: Nashville, Tennessee : U.S. Geological Survey, 1990 Format: Book Access & Availability: Loading
2. Long-term effects of surface coal mining on ground-water levels and quality in two small watersheds in eastern Ohio Author/Creator: Cunningham, William L., author Publication/Creation: Columbus, Ohio : U.S. Geological Survey, 1990 Format: Book Access & Availability: Loading